US6219263B1 - Electronic power supply device - Google Patents

Electronic power supply device Download PDF

Info

Publication number
US6219263B1
US6219263B1 US08/945,921 US94592197A US6219263B1 US 6219263 B1 US6219263 B1 US 6219263B1 US 94592197 A US94592197 A US 94592197A US 6219263 B1 US6219263 B1 US 6219263B1
Authority
US
United States
Prior art keywords
voltage
current
capacitors
capacitor
power factor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US08/945,921
Inventor
Luc Wuidart
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STMicroelectronics SA
Original Assignee
SGS Thomson Microelectronics SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SGS Thomson Microelectronics SA filed Critical SGS Thomson Microelectronics SA
Assigned to SGS-THOMSON MICROELECTRONICS S.A. reassignment SGS-THOMSON MICROELECTRONICS S.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WUIDART, LUC
Application granted granted Critical
Publication of US6219263B1 publication Critical patent/US6219263B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4266—Arrangements for improving power factor of AC input using passive elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

Definitions

  • the invention relates to an electronic supply device. More particularly, it relates to a device with a power factor correction circuit.
  • FIG. 1 A bridge rectifier 1 receives a periodically varying voltage V AC at a pair of input terminals.
  • a power factor correction circuit 3 is connected between the rectifier 1 and a load 2 at a pair of output terminals of the rectifier. This circuit 3 uses two filtering capacitors, C 1 and C 2 , having the same capacitance.
  • a first rectifier diode D 1 is connected directly between the two capacitors C 1 and C 2 .
  • the assembly is connected between two output terminals of the bridge rectifier.
  • a second rectifier diode D 2 is reverse-connected in parallel with the combination of the first capacitor C 1 in series with the first diode D 1 .
  • a third rectifier diode D 3 is reverse-connected in parallel with the combination of the second capacitor in series with the first diode D 1 .
  • the diode D 1 In a steady operating state, at a start of a half-wave of the line voltage V in , the diode D 1 is off. The diodes D 2 and D 3 are on. This corresponds to the end of the period of the discharging of the capacitors C 1 and C 2 .
  • the diodes D 2 and D 3 go to the off state.
  • the diode D 1 becomes conductive (T 1 ) and the two capacitors are charged in series until the line voltage reaches its peak value Vc (T 2 ).
  • the diode D 1 then goes back to the off state.
  • the two capacitors are each charged at Vc/2 (being identical capacitors).
  • the capacitors are again parallel-connected.
  • the capacitor C 1 supplies the load through the diode D 3 and the capacitor C 2 supplies the load through the diode D 2 .
  • This process stops as soon as the line voltage V in again starts increasing (at the next half-wave) and becomes greater than the voltage of each capacitor: the diodes D 2 and D 3 go back to the off state, the diode D 1 remains off.
  • the system is then at T 0 , and the cycle then repeats.
  • the current waveform I in shown in FIG. 2 is obtained.
  • I in(t) P out /V in(t) .
  • the circuit 3 therefore makes it possible to increase the angle of flow of the bridge rectifier.
  • the waveform of the current I in is spread over the voltage half-wave with three phases of conduction: [T 0 -T 1 ], [T 1 -T 2 ] and [T 2 -T 3 ].
  • the power factor of the device namely the ratio of the actual power to the apparent total power
  • the line is forced to consume current during the most significant part of the voltage wave, namely when the instantaneous value of the line voltage exceeds half of the peak value Vc.
  • An object of the invention is to improve the afore-mentioned power factor correction circuit.
  • An object of the invention is to reduce the low frequency harmonic contents of the waveform of the current drawn from the rectifier.
  • the invention relates to an electronic supply device for a load comprising a bridge rectifier receiving a periodic voltage at a pair of input terminals and a power factor correction circuit connected to a pair of output terminals of the rectifier.
  • the power correction circuit includes two capacitors, a rectifier diode to charge them in series and two rectifier diodes to discharge them in parallel.
  • the correction circuit further includes a resistor that is series-connected to the first rectifier diode to limit the current drawn in the capacitors and reduce the low frequency harmonic contents of the current conducted by the rectifier.
  • the capacitors are charged immediately.
  • the resistor in addition to attenuating low frequency harmonic contents, will limit the drawn current which, if excessively high, damages the diodes and the capacitors.
  • a particular three-diode structure of the power factor correction circuit according to the invention is used to protect the circuitry downline with respect to the rectifier against overvoltages on the mains supply system.
  • zener diodes are used as rectifier diodes.
  • the three zener diodes are series-connected.
  • the circuitry is therefore protected against overvoltages greater than three zener voltages.
  • Each capacitor is protected against overvoltages greater than two zener voltages.
  • One variant uses a current-controlled power switch parallel-connected with the resistor and the diode which controls the series charging of the capacitors.
  • a zener diode is used for each of the two diodes that controls the discharging of the capacitors. In this way, it is possible to protect the circuitry against overvoltages greater than two zener voltages and the capacitors against overvoltages greater than one zener voltage.
  • FIG. 1 is an electrical drawing of a power factor correction circuit already described
  • FIG. 2 shows corresponding waveforms of current and line voltage
  • FIG. 3 shows a diagram of a power factor correction circuit according to the invention.
  • FIG. 4 shows another diagram of a power factor correction circuit according to the invention.
  • FIG. 3 shows a diagram of a power factor correction circuit 3 according to the invention, connected to a pair of output terminals of a bridge rectifier supplied by a mains voltage V AC .
  • the rectifier 1 and the power factor correction circuit 3 supply a load 2 .
  • the circuit 3 has two filtering capacitors Cl and C 2 series-connected with the output terminals of the rectifier 1 .
  • a resistor R and a first directly mounted diode D 4 are series-connected between the two capacitors C 1 , C 2 .
  • a second diode D 5 is reverse-connected and parallel-connected with the series-connected assembly formed by the first capacitor C 1 , the resistor R and the first diode D 4 .
  • a third diode D 6 is reverse-connected and parallel-connected to the series-connected assembly of the second capacitor C 2 , the resistor R and the first diode D 4 .
  • the assembly formed by the resistor R and the first diode D 4 controls the series charging of the capacitors C 1 and C 2 .
  • the resistor R according to the invention makes it possible to limit the current drawn in the capacitors when the voltage is first turned on. In the worst possible case, when the equipment is turned on at a time corresponding to a half-wave peak, the value of the drawn current will thus be limited to Vc/R, Vc being the peak voltage of the line voltage.
  • the resistor R according to the invention further enables the charging current to be attenuated. This results in a rounding out of the waveform portion of the corresponding line current as shown in dashes in FIG. 2 (interval [T 1 -T 2 ]).
  • V AC 230 volts AC
  • the unit formed by the device for rectifying and power factor correction may advantageously take the form of an integrated circuit.
  • zener diodes are used as rectifier diodes D 4 , D 5 and D 6 .
  • the structure of the power factor correction circuit 3 has three rectifier diodes series-connected with the pair of output terminals of the rectifier.
  • three voltage limitation rectifier diodes it is then possible to shield the downline circuitry (the load 2 ) against mains overvoltages greater than three times the limitation voltage (three zener voltages).
  • the structure has two rectifier diodes parallel connected with each of the capacitors.
  • each capacitor is shielded against overvoltages greater than twice the limiting voltage (namely two zener voltages).
  • This limiting voltage should be chosen as to be greater than half the peak value Vc of the line voltage.
  • FIG. 4 One variant of the power factor correction circuit used for the protection against overvoltages according to the invention is shown in FIG. 4 .
  • the diodes D 5 and D 6 which control the discharging of the capacitors in parallel are voltage limiting rectifier diodes.
  • an electronic switch T 1 current-controlled in reverse by one of the zener diodes, D 5 in the example is, for example, a triac, and a resistor r 1 connected to the zener diode D 5 gives the negative trigger current needed to activate the triac.
  • the assembly D 6 , T 1 , D 5 allows the passage of the reverse current and enables protection against overvoltages greater than only twice the zener voltage.
  • the diodes D 5 and D 6 must be such that they remain off when the line voltage reaches the peak value Vc. This leads in practice to taking the following value as a zener voltage:
  • the peak voltage Vc of the rectified line voltage V in is equal to 310 volts. If the zener diodes are chosen with a zener voltage of 180 volts, the circuitry is protected for overvoltages of over 360 volts.
  • This circuit with current-controlled switch requires another zener diode D 7 connected between the zener diode D 5 and between the series connection of D 4 ′ and C 2 so that the switch is accurately controlled during the overvoltage. In practice, a 5-volt zener diode is sufficient for this task.
  • the rectifier device and the correction circuit may be made in one and the same integrated circuit.

Abstract

A power factor correction circuit using a first rectifier diode to control the series charging of two capacitors and two rectifier diodes to control the parallel discharging of the two capacitors. The power factor correction circuit further includes a resistor that is series-connected with the first diode to improve the power factor and to reduce the current drawn when the voltage is turned on. The rectifier diodes are advantageously voltage limiting diodes to protect the downline circuitry against overvoltages. In one improvement, a current-controlled electronic switch is used for protection against overvoltages that are just above the peak value of the line voltage.

Description

BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to an electronic supply device. More particularly, it relates to a device with a power factor correction circuit.
2. Description of the Prior Art
There is a known circuit for the correction of power factor without line inductance. The circuit is connected to the output of a bridge rectifier and uses rectifier diodes for the series charging and parallel discharging of two filtering capacitors. An electrical diagram of such a circuit is shown in FIG. 1. A bridge rectifier 1 receives a periodically varying voltage VAC at a pair of input terminals. A power factor correction circuit 3 is connected between the rectifier 1 and a load 2 at a pair of output terminals of the rectifier. This circuit 3 uses two filtering capacitors, C1 and C2, having the same capacitance.
A first rectifier diode D1 is connected directly between the two capacitors C1 and C2. The assembly is connected between two output terminals of the bridge rectifier.
A second rectifier diode D2 is reverse-connected in parallel with the combination of the first capacitor C1 in series with the first diode D1.
A third rectifier diode D3 is reverse-connected in parallel with the combination of the second capacitor in series with the first diode D1.
The working of such a circuit shall now be explained with reference to the curves shown in FIG. 2.
In a steady operating state, at a start of a half-wave of the line voltage Vin, the diode D1 is off. The diodes D2 and D3 are on. This corresponds to the end of the period of the discharging of the capacitors C1 and C2. When the line voltage Vin exceeds the charging voltage of the capacitors, the diodes D2 and D3 go to the off state. Then, when the line voltage Vin exceeds the sum of the charging voltages of the two capacitors (Vc1+Vc2), the diode D1 becomes conductive (T1) and the two capacitors are charged in series until the line voltage reaches its peak value Vc (T2). The diode D1 then goes back to the off state. The two capacitors are each charged at Vc/2 (being identical capacitors).
The line voltage, which then decreases, becomes lower than this charging voltage Vc/2: the diodes D2 and D3 therefore come on, while D1 remains off (T3). The capacitors are again parallel-connected. The capacitor C1 supplies the load through the diode D3 and the capacitor C2 supplies the load through the diode D2. This process stops as soon as the line voltage Vin again starts increasing (at the next half-wave) and becomes greater than the voltage of each capacitor: the diodes D2 and D3 go back to the off state, the diode D1 remains off. The system is then at T0, and the cycle then repeats. The current waveform Iin shown in FIG. 2 is obtained.
Between T0 and T1, it is the mains supply system (VAC) that directly supplies the load (with D1, D2 and D3 off). The shape of the current waveform for a value of power Pout consumed in the load 2 is given by the relationship:
I in(t) =P out /V in(t)
For Pout constant, between T0 and T1, Vin increases and Iin decreases.
Between T1 and T2, the capacitors are charged. On top of the current consumed in the load 2 (shown in dashes), there is superimposed the charging current for the capacitors.
Between T2 and T3, the charging of the capacitors, each at half of the peak voltage Vc, is over. The current Iin is only the current consumed in the load 2 and the waveform of the current is given by the relationship:
I in(t) =P out /V in(t).
The line voltage decreases and Iin decreases (with Pout constant).
Finally, between T3 and T0, it is the capacitors C1 and C2 that supply the load 2. The current Iin drawn from the rectifier is zero.
The circuit 3 therefore makes it possible to increase the angle of flow of the bridge rectifier. The waveform of the current Iin is spread over the voltage half-wave with three phases of conduction: [T0-T1], [T1-T2] and [T2-T3]. In this way, the power factor of the device (namely the ratio of the actual power to the apparent total power) is improved since the line is forced to consume current during the most significant part of the voltage wave, namely when the instantaneous value of the line voltage exceeds half of the peak value Vc.
However, for the charging of the capacitors, there is a drawing of charging current which gives rise to a steep leading edge of the line current. There is therefore a current peak. This corresponds to non-negligible low frequency harmonic contents that limit the value of the power factor (with a supply of power at harmonic frequencies different from the line frequency).
SUMMARY OF THE INVENTION
An object of the invention is to improve the afore-mentioned power factor correction circuit.
An object of the invention is to reduce the low frequency harmonic contents of the waveform of the current drawn from the rectifier.
As characterized, the invention relates to an electronic supply device for a load comprising a bridge rectifier receiving a periodic voltage at a pair of input terminals and a power factor correction circuit connected to a pair of output terminals of the rectifier. The power correction circuit includes two capacitors, a rectifier diode to charge them in series and two rectifier diodes to discharge them in parallel. According to the invention, the correction circuit further includes a resistor that is series-connected to the first rectifier diode to limit the current drawn in the capacitors and reduce the low frequency harmonic contents of the current conducted by the rectifier.
The addition of a resistor in series with the diode that enables the control of the charging of the capacitors in series makes it possible to attenuate the charging current. This results in a more rounded-out waveform of the line current: the low frequency harmonic contents of such a waveform are highly attenuated. The power factor of this device is thus appreciably improved.
Furthermore, when the voltage is turned on, the capacitors are charged immediately. However, the resistor, in addition to attenuating low frequency harmonic contents, will limit the drawn current which, if excessively high, damages the diodes and the capacitors.
In one improvement of the invention, a particular three-diode structure of the power factor correction circuit according to the invention is used to protect the circuitry downline with respect to the rectifier against overvoltages on the mains supply system.
According to the invention, zener diodes are used as rectifier diodes. In the event of overvoltage in the mains supply system, the three zener diodes are series-connected. The circuitry is therefore protected against overvoltages greater than three zener voltages. Each capacitor is protected against overvoltages greater than two zener voltages.
One variant uses a current-controlled power switch parallel-connected with the resistor and the diode which controls the series charging of the capacitors. A zener diode is used for each of the two diodes that controls the discharging of the capacitors. In this way, it is possible to protect the circuitry against overvoltages greater than two zener voltages and the capacitors against overvoltages greater than one zener voltage.
BRIEF DESCRIPTION OF THE DRAWINGS
Other features and advantages of the invention are described in detail in the following description made with reference to the appended drawings, in which:
FIG. 1 is an electrical drawing of a power factor correction circuit already described,
FIG. 2 shows corresponding waveforms of current and line voltage,
FIG. 3 shows a diagram of a power factor correction circuit according to the invention, and
FIG. 4 shows another diagram of a power factor correction circuit according to the invention.
MORE DETAILED DESCRIPTION
FIG. 3 shows a diagram of a power factor correction circuit 3 according to the invention, connected to a pair of output terminals of a bridge rectifier supplied by a mains voltage VAC.
The rectifier 1 and the power factor correction circuit 3 supply a load 2.
The circuit 3 has two filtering capacitors Cl and C2 series-connected with the output terminals of the rectifier 1. A resistor R and a first directly mounted diode D4 are series-connected between the two capacitors C1, C2.
A second diode D5 is reverse-connected and parallel-connected with the series-connected assembly formed by the first capacitor C1, the resistor R and the first diode D4.
A third diode D6 is reverse-connected and parallel-connected to the series-connected assembly of the second capacitor C2, the resistor R and the first diode D4.
The assembly formed by the resistor R and the first diode D4 controls the series charging of the capacitors C1 and C2. The resistor R according to the invention makes it possible to limit the current drawn in the capacitors when the voltage is first turned on. In the worst possible case, when the equipment is turned on at a time corresponding to a half-wave peak, the value of the drawn current will thus be limited to Vc/R, Vc being the peak voltage of the line voltage. The resistor R according to the invention further enables the charging current to be attenuated. This results in a rounding out of the waveform portion of the corresponding line current as shown in dashes in FIG. 2 (interval [T1-T2]).
The trade-off here is that the resistor consumes current. However, it has been determined in practice that for a resistor consuming only 1% of the power available, the power factor of the device is very appreciably improved.
In one example, for 100 watts, with:
VAC=230 volts AC,
C1=C2=40 microfarads,
R=20 ohms, PRmax=1 watt,
there is obtained a power factor PF=0.88.
Finally, the unit formed by the device for rectifying and power factor correction may advantageously take the form of an integrated circuit.
In one improvement shown in FIG. 3, zener diodes are used as rectifier diodes D4, D5 and D6.
Indeed, the structure of the power factor correction circuit 3 has three rectifier diodes series-connected with the pair of output terminals of the rectifier. By using three voltage limitation rectifier diodes, it is then possible to shield the downline circuitry (the load 2) against mains overvoltages greater than three times the limitation voltage (three zener voltages). Furthermore, the structure has two rectifier diodes parallel connected with each of the capacitors.
In the same way, by using two voltage limiting rectifier diodes, each capacitor is shielded against overvoltages greater than twice the limiting voltage (namely two zener voltages). This limiting voltage should be chosen as to be greater than half the peak value Vc of the line voltage.
One variant of the power factor correction circuit used for the protection against overvoltages according to the invention is shown in FIG. 4. The diodes D5 and D6 which control the discharging of the capacitors in parallel are voltage limiting rectifier diodes.
However, in parallel with the first rectifier diode D4 that is in series with the resistor R, there is placed an electronic switch T1 current-controlled in reverse by one of the zener diodes, D5 in the example. This electronic switch is, for example, a triac, and a resistor r1 connected to the zener diode D5 gives the negative trigger current needed to activate the triac.
In the event of overvoltage, the assembly D6, T1, D5 allows the passage of the reverse current and enables protection against overvoltages greater than only twice the zener voltage.
As we have seen here above, the diodes D5 and D6 must be such that they remain off when the line voltage reaches the peak value Vc. This leads in practice to taking the following value as a zener voltage:
Vz>Vc/2
For example, for 220 VAC, the peak voltage Vc of the rectified line voltage Vin is equal to 310 volts. If the zener diodes are chosen with a zener voltage of 180 volts, the circuitry is protected for overvoltages of over 360 volts.
This circuit with current-controlled switch requires another zener diode D7 connected between the zener diode D5 and between the series connection of D4′ and C2 so that the switch is accurately controlled during the overvoltage. In practice, a 5-volt zener diode is sufficient for this task.
Finally, in the two examples of a power factor correction circuit with protection against the overvoltages, the rectifier device and the correction circuit may be made in one and the same integrated circuit.

Claims (9)

What is claimed is:
1. An electronic supply device for a load comprising:
a bridge rectifier having a pair of input terminals that receive a periodic voltage and a pair of output terminals; and
a power factor correction circuit connected to the pair of output terminals of the bridge rectifier, the power factor correction circuit including two capacitors, a first rectifier diode coupled to the two capacitors to charge the two capacitors in series, and second and third rectifier diodes coupled to the two capacitors to discharge the two capacitors in parallel, wherein the power factor correction circuit further includes:
a resistor that is series-connected with the first rectifier diode to limit the current drawn in the two capacitors and to reduce low frequency harmonic contents of a current conducted by the bridge rectifier;
a current-controlled electronic switch that is parallel-connected with the first rectifier diode in series with the resistor; and
wherein, to discharge the two capacitors in parallel, the second and third rectifier diodes are zener diodes, to protect the load against overvoltages.
2. The electronic supply device of claim 1, wherein said current-controlled electronic switch is a triac.
3. The electronic supply device of claim 1, wherein a current that controls the current controlled-electronic switch is provided by one of the zener diodes.
4. The electronic supply device of claim 1, wherein the resistor is calibrated to dissipate at most 1% of a nominal power available at the pair of output terminals of the bridge rectifier.
5. The electronic supply device of claim 1, wherein the second and third rectifier diodes are arranged to dissipate overvoltage conditions occurring between the pair of output terminals of the bridge rectifier, and wherein the electronic supply device is integrated within a single integrated circuit.
6. A power factor correction circuit comprising:
a pair of terminals that receive a periodically varying input voltage, the pair of terminals including a first terminal and a second terminal;
a first capacitor and a second capacitor coupled in series between the first terminal and the second terminal, the first capacitor storing a first voltage, and the second capacitor storing a second voltage;
a first voltage controlled switch coupled in series between the first capacitor and the second capacitor that allows charging the first and second capacitors when the input voltage is greater than a sum of the first voltage and the second voltage;
a second voltage controlled switch having a first end that is connected to the first terminal and a second end that is coupled between the first voltage controlled switch and the second capacitor the second voltage controlled switch allowing discharge of the second capacitor when the input voltage is less than the second voltage;
a third voltage controlled switch having a first end that is connected to the second terminal and a second end that is connected between the first voltage controlled switch and the first capacitor, the third voltage controlled switch allowing discharge of the first capacitor when the input voltage is less than the first voltage; and
a resistor connected in series between the first capacitor and the first voltage controlled switch that limits a charging current of the first and second capacitors and attenuates low frequency harmonic contents of the charging current when the input voltage is greater than the sum of the first voltage and the second voltage;
wherein the second and third voltage controlled switches have second and third overvoltage limits respectively, and the power factor correction circuit further comprises:
an overvoltage protection assembly having a first end that is connected between the first capacitor and the resistor and having a second end that is connected to the second end of the second voltage controlled switch the overvoltage protection assembly limiting a voltage difference between the first and second terminals to a sum of the overvoltage limits of the second and third voltage controlled switches; and wherein the overvoltage protection assembly includes:
a current controlled electronic switch; and
a second resistor, the second resistor being connected in series with the current controlled electronic switch.
7. The power factor correction circuit of claim 6, wherein the power factor collection circuit further comprises:
a fourth voltage controlled switch that couples the second end of the second voltage controlled switch between the first voltage controlled switch and the second capacitor to accurately control the current controlled electronic switch when the periodically varying input voltage exceeds a sum of the second and third overvoltage limits.
8. The power factor correction circuit of claim 7, wherein:
the current controlled electronic switch is a triac;
the second and third voltage controlled switches are zener diodes each having a substantially similar overvoltage limit that is greater than either of the first voltage and the second voltage and lower than the sum of the first voltage and the second voltage; and
the fourth voltage controlled switch is a zener diode.
9. The power factor correction circuit of claim 6 or 7, wherein the power factor correction circuit is integrated within a single integrated circuit.
US08/945,921 1995-05-19 1996-05-15 Electronic power supply device Expired - Lifetime US6219263B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9506007A FR2734424B1 (en) 1995-05-19 1995-05-19 ELECTRONIC POWER SUPPLY
FR9506007 1995-05-19
PCT/FR1996/000740 WO1996037038A1 (en) 1995-05-19 1996-05-15 Electronic power supply device

Publications (1)

Publication Number Publication Date
US6219263B1 true US6219263B1 (en) 2001-04-17

Family

ID=9479204

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/945,921 Expired - Lifetime US6219263B1 (en) 1995-05-19 1996-05-15 Electronic power supply device

Country Status (5)

Country Link
US (1) US6219263B1 (en)
EP (1) EP0826268B1 (en)
DE (1) DE69601364T2 (en)
FR (1) FR2734424B1 (en)
WO (1) WO1996037038A1 (en)

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060132262A1 (en) * 2004-12-22 2006-06-22 Fazzio Ronald S Acoustic resonator performance enhancement using selective metal etch
US20070019448A1 (en) * 2003-07-17 2007-01-25 Koninklijke Philips Electronics N.V. Power converter
US20070063622A1 (en) * 2005-09-09 2007-03-22 Rudy Richard C Adjusted frequency temperature coefficient resonator
US20070086080A1 (en) * 2005-10-18 2007-04-19 Larson John D Iii Acoustic galvanic isolator incorporating series-connected decoupled stacked bulk acoustic resonators
US20070086274A1 (en) * 2005-10-18 2007-04-19 Ken Nishimura Acoustically communicating data signals across an electrical isolation barrier
US20070090892A1 (en) * 2005-10-18 2007-04-26 Larson John D Iii Acoustic galvanic isolator incorporating single decoupled stacked bulk acoustic resonator
US20070096595A1 (en) * 2005-10-31 2007-05-03 Larson John D Iii AC-DC power converter
US20070176710A1 (en) * 2006-01-30 2007-08-02 Tiberiu Jamneala Impedance transforming bulk acoustic wave baluns
US20070210724A1 (en) * 2006-03-09 2007-09-13 Mark Unkrich Power adapter and DC-DC converter having acoustic transformer
US20070210748A1 (en) * 2006-03-09 2007-09-13 Mark Unkrich Power supply and electronic device having integrated power supply
US20070211504A1 (en) * 2006-03-09 2007-09-13 Mark Unkrich AC-DC converter circuit and power supply
US20080060181A1 (en) * 2005-04-06 2008-03-13 Fazzio Ronald S Acoustic resonator performance enhancement using filled recess region
US20080258842A1 (en) * 2004-10-01 2008-10-23 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Acoustic resonator performance enhancement using alternating frame structure
US20090086654A1 (en) * 2007-09-28 2009-04-02 Tiberiu Jamneala Single stack coupled resonators having differential output
US20090096547A1 (en) * 2005-04-18 2009-04-16 Avago Technologies Wireless Ip(Singapore) Pte.Ltd. Acoustically coupled resonators and method of making the same
US20090101999A1 (en) * 2006-03-10 2009-04-23 Avago Technologies Wireless Ip(Singapore)Pte. Ltd. Electronic device on substrate with cavity and mitigated parasitic leakage path
US20090273256A1 (en) * 2008-04-30 2009-11-05 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Transceiver circuit for film bulk acoustic resonator (fbar) transducers
US20090273415A1 (en) * 2008-04-30 2009-11-05 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Bulk acoustic resonator electrical impedance transformers
US7802349B2 (en) 2003-03-07 2010-09-28 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Manufacturing process for thin film bulk acoustic resonator (FBAR) filters
US20110128092A1 (en) * 2009-11-30 2011-06-02 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Duplexer with negative phase shifting circuit
US8143082B2 (en) 2004-12-15 2012-03-27 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Wafer bonding of micro-electro mechanical systems to active circuitry
US8248185B2 (en) 2009-06-24 2012-08-21 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Acoustic resonator structure comprising a bridge
CN102769956A (en) * 2012-06-29 2012-11-07 艾维新能源科技南京有限公司 High-power factor filtering circuit
US8350445B1 (en) 2011-06-16 2013-01-08 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Bulk acoustic resonator comprising non-piezoelectric layer and bridge
CN103199716A (en) * 2012-01-06 2013-07-10 牛嶋昌和 Auxiliary power source generating circuit
US8575820B2 (en) 2011-03-29 2013-11-05 Avago Technologies General Ip (Singapore) Pte. Ltd. Stacked bulk acoustic resonator
US8796904B2 (en) 2011-10-31 2014-08-05 Avago Technologies General Ip (Singapore) Pte. Ltd. Bulk acoustic resonator comprising piezoelectric layer and inverse piezoelectric layer
US8902023B2 (en) 2009-06-24 2014-12-02 Avago Technologies General Ip (Singapore) Pte. Ltd. Acoustic resonator structure having an electrode with a cantilevered portion
US8922302B2 (en) 2011-08-24 2014-12-30 Avago Technologies General Ip (Singapore) Pte. Ltd. Acoustic resonator formed on a pedestal
US8962443B2 (en) 2011-01-31 2015-02-24 Avago Technologies General Ip (Singapore) Pte. Ltd. Semiconductor device having an airbridge and method of fabricating the same
US8981876B2 (en) 2004-11-15 2015-03-17 Avago Technologies General Ip (Singapore) Pte. Ltd. Piezoelectric resonator structures and electrical filters having frame elements
US9048812B2 (en) 2011-02-28 2015-06-02 Avago Technologies General Ip (Singapore) Pte. Ltd. Bulk acoustic wave resonator comprising bridge formed within piezoelectric layer
US9083302B2 (en) 2011-02-28 2015-07-14 Avago Technologies General Ip (Singapore) Pte. Ltd. Stacked bulk acoustic resonator comprising a bridge and an acoustic reflector along a perimeter of the resonator
US9136818B2 (en) 2011-02-28 2015-09-15 Avago Technologies General Ip (Singapore) Pte. Ltd. Stacked acoustic resonator comprising a bridge
US9148117B2 (en) 2011-02-28 2015-09-29 Avago Technologies General Ip (Singapore) Pte. Ltd. Coupled resonator filter comprising a bridge and frame elements
US9154112B2 (en) 2011-02-28 2015-10-06 Avago Technologies General Ip (Singapore) Pte. Ltd. Coupled resonator filter comprising a bridge
US9203374B2 (en) 2011-02-28 2015-12-01 Avago Technologies General Ip (Singapore) Pte. Ltd. Film bulk acoustic resonator comprising a bridge
WO2015192741A1 (en) * 2014-06-19 2015-12-23 熊晓丹 High-power-factor valley-fill circuit for driving switch type load, and switching power supply
US9243316B2 (en) 2010-01-22 2016-01-26 Avago Technologies General Ip (Singapore) Pte. Ltd. Method of fabricating piezoelectric material with selected c-axis orientation
US9425764B2 (en) 2012-10-25 2016-08-23 Avago Technologies General Ip (Singapore) Pte. Ltd. Accoustic resonator having composite electrodes with integrated lateral features
US20160262228A1 (en) * 2015-03-02 2016-09-08 Epistar Corporation LED Driver and Illumination System Related to the Same
US9444426B2 (en) 2012-10-25 2016-09-13 Avago Technologies General Ip (Singapore) Pte. Ltd. Accoustic resonator having integrated lateral feature and temperature compensation feature
TWI663893B (en) * 2015-03-02 2019-06-21 晶元光電股份有限公司 Led driver and illumination system related to the same
US20190319547A1 (en) * 2016-05-17 2019-10-17 Yuriy Borisovich Sokolov Led light source powered by an unstable three-phase ac network
TWI678944B (en) * 2015-10-23 2019-12-01 晶元光電股份有限公司 Led driver and illumination system related to the same
US10499475B2 (en) 2017-04-05 2019-12-03 Epistar Corporation LED driver and illumination system related to the same
US10938295B2 (en) 2016-11-30 2021-03-02 Yuriy Borisovich Sokolov Multiphase AC power supply with correction of distortions of consumed current
USRE48798E1 (en) * 2015-03-02 2021-10-26 Epistar Corporation LED driver and illumination system related to the same

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG90124A1 (en) * 2000-04-10 2002-07-23 Speedy Tech Electronics S Pte Energy efficient method and apparatus for shaping input waveform
DE10062980A1 (en) * 2000-12-16 2002-07-11 Philips Corp Intellectual Pty circuitry
CN100530890C (en) * 2006-02-22 2009-08-19 艾默生网络能源系统有限公司 Power factor correction circuit
DE102019203122A1 (en) * 2019-03-07 2020-09-10 Vitesco Technologies GmbH Circuit device for connecting a load to a supply network, method and device for operating a circuit device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4186418A (en) * 1976-08-25 1980-01-29 Robert Bosch Gmbh Overvoltage protected integrated circuit network, to control current flow through resistive or inductive loads
WO1991002400A1 (en) 1989-08-04 1991-02-21 Courier De Mere Henri Edouard Feeding device for converters, free of harmonic distortion
WO1992022953A1 (en) 1991-06-19 1992-12-23 Golden Power Electronics Pty. Ltd. Electrical power supply
EP0600340A1 (en) 1992-12-04 1994-06-08 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Passive circuit for improving the power factor
EP0602908A1 (en) 1992-12-14 1994-06-22 General Electric Company High power factor circuit for powering a load
US5345164A (en) 1993-04-27 1994-09-06 Metcal, Inc. Power factor corrected DC power supply

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4186418A (en) * 1976-08-25 1980-01-29 Robert Bosch Gmbh Overvoltage protected integrated circuit network, to control current flow through resistive or inductive loads
WO1991002400A1 (en) 1989-08-04 1991-02-21 Courier De Mere Henri Edouard Feeding device for converters, free of harmonic distortion
WO1992022953A1 (en) 1991-06-19 1992-12-23 Golden Power Electronics Pty. Ltd. Electrical power supply
EP0600340A1 (en) 1992-12-04 1994-06-08 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Passive circuit for improving the power factor
EP0602908A1 (en) 1992-12-14 1994-06-22 General Electric Company High power factor circuit for powering a load
US5345164A (en) 1993-04-27 1994-09-06 Metcal, Inc. Power factor corrected DC power supply

Cited By (73)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7802349B2 (en) 2003-03-07 2010-09-28 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Manufacturing process for thin film bulk acoustic resonator (FBAR) filters
US7321483B2 (en) * 2003-07-17 2008-01-22 Schetters Cornelis Johannes Ad Power converter
US20070019448A1 (en) * 2003-07-17 2007-01-25 Koninklijke Philips Electronics N.V. Power converter
CN100431254C (en) * 2003-07-17 2008-11-05 Nxp股份有限公司 Power converter
US7714684B2 (en) 2004-10-01 2010-05-11 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Acoustic resonator performance enhancement using alternating frame structure
US20080258842A1 (en) * 2004-10-01 2008-10-23 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Acoustic resonator performance enhancement using alternating frame structure
US8981876B2 (en) 2004-11-15 2015-03-17 Avago Technologies General Ip (Singapore) Pte. Ltd. Piezoelectric resonator structures and electrical filters having frame elements
US8143082B2 (en) 2004-12-15 2012-03-27 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Wafer bonding of micro-electro mechanical systems to active circuitry
US7791434B2 (en) 2004-12-22 2010-09-07 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Acoustic resonator performance enhancement using selective metal etch and having a trench in the piezoelectric
US8188810B2 (en) 2004-12-22 2012-05-29 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Acoustic resonator performance enhancement using selective metal etch
US20060132262A1 (en) * 2004-12-22 2006-06-22 Fazzio Ronald S Acoustic resonator performance enhancement using selective metal etch
US8230562B2 (en) 2005-04-06 2012-07-31 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Method of fabricating an acoustic resonator comprising a filled recessed region
US20080060181A1 (en) * 2005-04-06 2008-03-13 Fazzio Ronald S Acoustic resonator performance enhancement using filled recess region
US20090096547A1 (en) * 2005-04-18 2009-04-16 Avago Technologies Wireless Ip(Singapore) Pte.Ltd. Acoustically coupled resonators and method of making the same
US20070063622A1 (en) * 2005-09-09 2007-03-22 Rudy Richard C Adjusted frequency temperature coefficient resonator
US7868522B2 (en) 2005-09-09 2011-01-11 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Adjusted frequency temperature coefficient resonator
US20070086080A1 (en) * 2005-10-18 2007-04-19 Larson John D Iii Acoustic galvanic isolator incorporating series-connected decoupled stacked bulk acoustic resonators
US20070086274A1 (en) * 2005-10-18 2007-04-19 Ken Nishimura Acoustically communicating data signals across an electrical isolation barrier
US20070090892A1 (en) * 2005-10-18 2007-04-26 Larson John D Iii Acoustic galvanic isolator incorporating single decoupled stacked bulk acoustic resonator
US7675390B2 (en) 2005-10-18 2010-03-09 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Acoustic galvanic isolator incorporating single decoupled stacked bulk acoustic resonator
US7525398B2 (en) 2005-10-18 2009-04-28 Avago Technologies General Ip (Singapore) Pte. Ltd. Acoustically communicating data signals across an electrical isolation barrier
US7737807B2 (en) 2005-10-18 2010-06-15 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Acoustic galvanic isolator incorporating series-connected decoupled stacked bulk acoustic resonators
US20090073730A1 (en) * 2005-10-31 2009-03-19 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. AC-DC Power Converter
US7463499B2 (en) 2005-10-31 2008-12-09 Avago Technologies General Ip (Singapore) Pte Ltd. AC-DC power converter
US20070096595A1 (en) * 2005-10-31 2007-05-03 Larson John D Iii AC-DC power converter
US7852644B2 (en) 2005-10-31 2010-12-14 Avago Technologies General Ip (Singapore) Pte. Ltd. AC-DC power converter
US7612636B2 (en) 2006-01-30 2009-11-03 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Impedance transforming bulk acoustic wave baluns
US20070176710A1 (en) * 2006-01-30 2007-08-02 Tiberiu Jamneala Impedance transforming bulk acoustic wave baluns
US8238129B2 (en) 2006-03-09 2012-08-07 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. AC-DC converter circuit and power supply
US20070211504A1 (en) * 2006-03-09 2007-09-13 Mark Unkrich AC-DC converter circuit and power supply
US20070210748A1 (en) * 2006-03-09 2007-09-13 Mark Unkrich Power supply and electronic device having integrated power supply
US7746677B2 (en) * 2006-03-09 2010-06-29 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. AC-DC converter circuit and power supply
US20100202174A1 (en) * 2006-03-09 2010-08-12 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Ac-dc converter circuit and power supply
US20070210724A1 (en) * 2006-03-09 2007-09-13 Mark Unkrich Power adapter and DC-DC converter having acoustic transformer
US8080854B2 (en) 2006-03-10 2011-12-20 Avago Technologies General Ip (Singapore) Pte. Ltd. Electronic device on substrate with cavity and mitigated parasitic leakage path
US20090101999A1 (en) * 2006-03-10 2009-04-23 Avago Technologies Wireless Ip(Singapore)Pte. Ltd. Electronic device on substrate with cavity and mitigated parasitic leakage path
US20090086654A1 (en) * 2007-09-28 2009-04-02 Tiberiu Jamneala Single stack coupled resonators having differential output
US7791435B2 (en) 2007-09-28 2010-09-07 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Single stack coupled resonators having differential output
US20090273256A1 (en) * 2008-04-30 2009-11-05 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Transceiver circuit for film bulk acoustic resonator (fbar) transducers
US20090273415A1 (en) * 2008-04-30 2009-11-05 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Bulk acoustic resonator electrical impedance transformers
US7732977B2 (en) 2008-04-30 2010-06-08 Avago Technologies Wireless Ip (Singapore) Transceiver circuit for film bulk acoustic resonator (FBAR) transducers
US7855618B2 (en) 2008-04-30 2010-12-21 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Bulk acoustic resonator electrical impedance transformers
US8902023B2 (en) 2009-06-24 2014-12-02 Avago Technologies General Ip (Singapore) Pte. Ltd. Acoustic resonator structure having an electrode with a cantilevered portion
US8248185B2 (en) 2009-06-24 2012-08-21 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Acoustic resonator structure comprising a bridge
US8193877B2 (en) 2009-11-30 2012-06-05 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Duplexer with negative phase shifting circuit
US20110128092A1 (en) * 2009-11-30 2011-06-02 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Duplexer with negative phase shifting circuit
US9243316B2 (en) 2010-01-22 2016-01-26 Avago Technologies General Ip (Singapore) Pte. Ltd. Method of fabricating piezoelectric material with selected c-axis orientation
US9859205B2 (en) 2011-01-31 2018-01-02 Avago Technologies General Ip (Singapore) Pte. Ltd. Semiconductor device having an airbridge and method of fabricating the same
US8962443B2 (en) 2011-01-31 2015-02-24 Avago Technologies General Ip (Singapore) Pte. Ltd. Semiconductor device having an airbridge and method of fabricating the same
US9048812B2 (en) 2011-02-28 2015-06-02 Avago Technologies General Ip (Singapore) Pte. Ltd. Bulk acoustic wave resonator comprising bridge formed within piezoelectric layer
US9083302B2 (en) 2011-02-28 2015-07-14 Avago Technologies General Ip (Singapore) Pte. Ltd. Stacked bulk acoustic resonator comprising a bridge and an acoustic reflector along a perimeter of the resonator
US9136818B2 (en) 2011-02-28 2015-09-15 Avago Technologies General Ip (Singapore) Pte. Ltd. Stacked acoustic resonator comprising a bridge
US9148117B2 (en) 2011-02-28 2015-09-29 Avago Technologies General Ip (Singapore) Pte. Ltd. Coupled resonator filter comprising a bridge and frame elements
US9154112B2 (en) 2011-02-28 2015-10-06 Avago Technologies General Ip (Singapore) Pte. Ltd. Coupled resonator filter comprising a bridge
US9203374B2 (en) 2011-02-28 2015-12-01 Avago Technologies General Ip (Singapore) Pte. Ltd. Film bulk acoustic resonator comprising a bridge
US8575820B2 (en) 2011-03-29 2013-11-05 Avago Technologies General Ip (Singapore) Pte. Ltd. Stacked bulk acoustic resonator
US8350445B1 (en) 2011-06-16 2013-01-08 Avago Technologies Wireless Ip (Singapore) Pte. Ltd. Bulk acoustic resonator comprising non-piezoelectric layer and bridge
US8922302B2 (en) 2011-08-24 2014-12-30 Avago Technologies General Ip (Singapore) Pte. Ltd. Acoustic resonator formed on a pedestal
US8796904B2 (en) 2011-10-31 2014-08-05 Avago Technologies General Ip (Singapore) Pte. Ltd. Bulk acoustic resonator comprising piezoelectric layer and inverse piezoelectric layer
CN103199716A (en) * 2012-01-06 2013-07-10 牛嶋昌和 Auxiliary power source generating circuit
CN102769956A (en) * 2012-06-29 2012-11-07 艾维新能源科技南京有限公司 High-power factor filtering circuit
US9425764B2 (en) 2012-10-25 2016-08-23 Avago Technologies General Ip (Singapore) Pte. Ltd. Accoustic resonator having composite electrodes with integrated lateral features
US9444426B2 (en) 2012-10-25 2016-09-13 Avago Technologies General Ip (Singapore) Pte. Ltd. Accoustic resonator having integrated lateral feature and temperature compensation feature
WO2015192741A1 (en) * 2014-06-19 2015-12-23 熊晓丹 High-power-factor valley-fill circuit for driving switch type load, and switching power supply
US20160262228A1 (en) * 2015-03-02 2016-09-08 Epistar Corporation LED Driver and Illumination System Related to the Same
US9894719B2 (en) * 2015-03-02 2018-02-13 Epistar Corporation LED driver and illumination system related to the same
TWI663893B (en) * 2015-03-02 2019-06-21 晶元光電股份有限公司 Led driver and illumination system related to the same
USRE48798E1 (en) * 2015-03-02 2021-10-26 Epistar Corporation LED driver and illumination system related to the same
TWI678944B (en) * 2015-10-23 2019-12-01 晶元光電股份有限公司 Led driver and illumination system related to the same
US20190319547A1 (en) * 2016-05-17 2019-10-17 Yuriy Borisovich Sokolov Led light source powered by an unstable three-phase ac network
US10938316B2 (en) * 2016-05-17 2021-03-02 Yuriy Borisovich Sokolov LED light source powered by an unstable three-phase AC network
US10938295B2 (en) 2016-11-30 2021-03-02 Yuriy Borisovich Sokolov Multiphase AC power supply with correction of distortions of consumed current
US10499475B2 (en) 2017-04-05 2019-12-03 Epistar Corporation LED driver and illumination system related to the same

Also Published As

Publication number Publication date
EP0826268A1 (en) 1998-03-04
FR2734424A1 (en) 1996-11-22
DE69601364T2 (en) 1999-05-27
DE69601364D1 (en) 1999-02-25
FR2734424B1 (en) 1997-06-13
WO1996037038A1 (en) 1996-11-21
EP0826268B1 (en) 1999-01-13

Similar Documents

Publication Publication Date Title
US6219263B1 (en) Electronic power supply device
US6169391B1 (en) Device for converting high voltage alternating current to low voltage direct current
US5726845A (en) Short circuit protection for power factor correction circuit
US5532917A (en) Power factor corrected rectifying circuit
US4539617A (en) AC Power line transient suppressing circuit
EP0476278A2 (en) Low harmonic current and fault tolerant power supply
EP0859453B1 (en) Power supply circuit for a control circuit
EP0625291B1 (en) A boost-converter with low losses
EP0391617B1 (en) Method and network for enhancing power factor of off-line switching circuit
US5353213A (en) Circuit configuration for a self-oscillating blocking oscillator switched-mode power supply
WO1996009684A1 (en) Power factor corrected electrical power converter
US5103388A (en) Low harmonic current and fault tolerant power supply
US20040027096A1 (en) Auxiliary circuit for power factor corrector having self-power supplying and zero current detection mechanisms
CA2088252C (en) Line-powered, phase-control circuit
US5896279A (en) Constant-voltage clamping forward conversion switching power supply
US6853564B2 (en) Switched linear inductor circuit for switched power supply
EP0256569A1 (en) Supply circuit for supplying a smoothed direct current to a load impedance
WO1992022953A1 (en) Electrical power supply
JP2000116133A (en) Waveform shaping circuit
US5481161A (en) Variable frequency generator for resonant power feedback
US5604422A (en) Transient voltage protection circuit for a DC voltage supply
WO2002065587A2 (en) Circuit for coupling energy to a pulse forming network or capacitor
WO1997030569A1 (en) In-rush surge limiting electronic ballast
US20050104563A1 (en) Circuit arrangement for power factor correction
KR100193627B1 (en) Switching element protection circuit composed of FPC circuit

Legal Events

Date Code Title Description
AS Assignment

Owner name: SGS-THOMSON MICROELECTRONICS S.A., FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WUIDART, LUC;REEL/FRAME:008934/0905

Effective date: 19971104

STCF Information on status: patent grant

Free format text: PATENTED CASE

FPAY Fee payment

Year of fee payment: 4

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 8

FPAY Fee payment

Year of fee payment: 12